steam generator main feed pump radial bearing modification

Steam GeneratorMain Feed PumpRadial BearingModification

Out-board BearingOut-board Bearing

In-board BearingIn-board Bearing

Out-board bearing cover removedOut-board bearing cover removed

Original style bearing installed.

The CURRENT bearing temperature detectorenters the bearing in the center, east side.

Oil supply inlet

In-board bearing cover removedIn-board bearing cover removed

Bearing temperature detectorenters the bearing in the center,right (west) side.

Oil supply inlet

The NEW and the OLDThe NEW and the OLD

New StyleNew StyleTilting PadTilting Pad

Radial BearingsRadial Bearings

Notice that the bearings are DIRECTIONAL, and are installed in ONE direction of rotation.

The new bearings have temperature detectors (RTD’s) installed INTO the bottom shoe.

NEW STYLE out-board bearing installedNEW STYLE out-board bearing installed

With the new bearing installed in the correct rotational direction, the RTD leads will exit the bearing on the PUMP SIDE of the bearing and will exit the housing on the west side. Which is opposite of the original installation.

RTD Lead

NEW STYLE in-board bearing installedNEW STYLE in-board bearing installed

With the new bearing installed in the correct rotational direction, the RTD leads will exit the bearing on theCOUPLING SIDE of the bearing. The RTD leads will go though the web of bearing saddle and will exit the housingon the west side.

Bearing RTD lead exits the in-boardBearing house on the west side.

RDT lead where it exits the bearingon the coupling side, and goesthrough the bearing saddle.

SGFP 23

SGFP 21

The EndThe End